fix typo in tmr.h (which cause tmr_enable register to have the wrong address)
fix typo in tmr.h (which cause tmr_enable register to have the wrong
address)

arurke/contiki,arurke/contiki,muffinator/libmc1322x,bluerover/6lbr,arurke/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,bluerover/6lbr,bluerover/6lbr,MohamedSeliem/contiki,MohamedSeliem/contiki,bluerover/6lbr,arurke/contiki,malvira/libmc1322x,MohamedSeliem/contiki,malvira/libmc1322x,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,bluerover/6lbr,arurke/contiki,bluerover/6lbr,bluerover/6lbr,arurke/contiki,muffinator/libmc1322x